Ventilating- ships



UNiTED STATES VPATENT oEEiCE.

`FREDERICK EMERSON, OF BOSTON, MASSACHUSETTS.

VENTILATING- SHIPS.

Specification of Letters Patent No. 5,842, dated vOctober 10, 1848'.

To all whom t may concern: Be it known that I, FREDERICK EMERSON, of Boston, in the county of Suolk and State of Massachusetts, have invented an Improved Method of Ventilating the Interior of Ships by Means of Ventilators, which I denominate Corresponding Ventilators,,and that the following is a full, clear, and exact description of the principle o-r character which distinguishesit from all other t-hings before known and of the usual manner of making, modifying, and using the same, reference being had to the accompanying drawing, which shows an elevated section of a ship with the ventilators attached. y

My impro-ved met-hod of Ventilating ships and other wat-er craft consists in placing, injecting ventilators, and ejecting ventilators in dierent parts o-f the craft, for removing the foul air therefrom, and supplying its place with pure air from the atmosphere above.

In the drawing the section of the ship is shown, cut in a vertical plane through the center, and exposing the interior. Near the stern, an injecting ventilator (a) is placed, constructed in the manner described in Letters Patent granted to me onr the 3d July, 1847, and which is now on record in the United States Patent Office.

The tube leading down from said injecting ventilator passes through the decks in any convenient part thereof, and extends into the lower part of the hold, where it opens and discharges a supply of fresh air from above. Near the bow of the vessel I place another description of ventilator, (o),

accumulate at that level, in ships holds. It will be seen that, by this arrangement, the corresponding operationof the twol ventilators must produce a j movement Vof air through'the ship, from the place wheret-he injecting pipe introduces the pure air, to the place from which the ej ecting pipe withdraws the vitiated air.

Although, in the drawing the ejecting ventilator is placed' in the vforward part of .the ship, and the injecting in the after part, their places may be exchanged without injury to their effect.y And although the pipes of these ventilators, as shown in the drawing, both terminate and open in the lower part of the hold, they may be made to terminate and open at any two places in the ship, between which places it is desired to product a movement of air from the one place to the other.

Where a very thorough ventilation is required, I employ an additional number of these ventilators, letting the pipes of some of them open near the upper deck, thereby displacing the lighter gases that are generated in a ship. Any practicable number may be adopted, and they may be made of any practicable size.

Having thus fully describedmy improved method of Ventilating ships, and other water craft, what I claim therein as new, and for which I desire to secure Letters Patent,

The employment of two or more certain ventilators, constructed in the manner specified, in combination with water craft, substantially as herein described for the purpose of `removing all noxious and unpleasant gasses therefrom, and introducing in their place pure atmospheric air.

FREDERICK EMERSON.

Witnesses l JACOB KEOBEL, T. G. DoNN, 

